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Rolls PA71PLUS User manual

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PA71PLUS
MicroMix
Power Amplifier
Owners Manual
Salt Lake City, Utah
7/01
PA71PLUS
MicroMix Power Amplifier
• RCA Inputs
• XLR Mic Input
• Spring-loaded output
• Low noise, efficient operation
The PA71 Plus mixes an unbalanced line level
signal with a mic signal to a powered 1/4" or
speaker terminal outputs.The unit is perfect
for small speakers in small environments.
LIMITED WARRANTY
This product is warranted to the original consumer purchaser to be
free from defects in materials and workmanship under normal installation,
use and service for a period of one (1) year from the date of purchase as
shown on the purchaser’s receipt.
The obligation of Rolls Corporation under this warranty shall be
limited to repair or replacement (at our option), during the warranty period
of any part which proves defective in material or workmanship under nor-
mal installation, use and service, provided the product is returned to Rolls
Corporation,TRANSPORTATION CHARGESPREPAID. Productsreturned
to us or to an authorized Service Center must be accompanied by a copy of
the purchase receipt. In the absence of such purchase receipt, the warranty
period shall be one (1) year from the date of manufacture.
This warranty shall be invalid if the product is damaged as a result
of defacement, misuse, abuse, neglect, accident, destruction or alteration of
the serial number, improper electrical voltages or currents, repair, alteration
or maintenance by any person or party other than our own service facility or
an authorized Service Center, or any use violative of instructions furnished
by us. This one-year warranty is in lieu of all expressed warranties, obli-
gations or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR
LIABILITIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PAR-
TICULARPURPOSE,SHALLBE LIMITEDIN DURATION TOTHE ONE
YEAR DURATION OF THIS WRITTEN LIMITED WARRANTY. Some
states do not allow limitations on how long an implied warranty lasts, so the
above limitation may not apply to you.
IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF
THIS OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED,
WHATSOEVER. Some states do not allow the exclusion or limitation of
special, incidental or consequential damages so the above limitation or ex-
clusion may not apply to you. This warranty gives you specific legal rights,
and you may also have other rights which vary from state to state.
MIC
INPUT
LINE
INPUT LINE/
POWER
OUT
SPEAKER
OUTPUT 12 VAC/
VDC
PWR
LINE
LEVEL MIC
LEVEL
PHANTOM
POWER
1
PA71.SCH A
25 MAY 2001Date:
Rev:
Sheet 1 of
PA71 POWER AMP
Ba
2
3
1
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ROLLS COPRORATION
5968 SOUTH 350 WEST
SALT LAKE CITY, UT 84107
S i z e : D o c u m e n t n u m b e r ;
2 2 0 0 U F 1 6 V
INTRODUCTION
Thank you for your purchase of the PA71 Plus MicrMix Power Amplifier.
This unit mixes a stereo RCA signal with a microphone to a 1/4" line level
output and a powered spring loaded speaker output.The unit for powering
small speakers in small environments.The 1/4" output is specially de-
signed to power stereo headphones.
DESCRIPTION
REAR PANEL
LINE INPUT:RCA line level inputs (mixed to mono)
MIC INPUT:Balanced XLR input for connection to a dynamic or con-
denser microphone.
LINE/POWER OUT:1/4"TRS output for connection to another amplifier,
or a pair of standard headphones.
SPEAKER OUTPUT:Spring-loaded terminals - the red terminal is
positive and the black one is negative.
12VAC/VDC:For connection to the power supply.
SIDE PANEL
PHANTOM POWER: Jumper pin for connecting 12 volts of phantom
power to the Mic Input.
FRONT PANEL
LINE LEVEL:Adjusts the level of signal from the Line Input to the Line/
Power and Speaker outputs.
MIC LEVEL:Adjusts the level of signal from the Line Input to the Line/
Power and Speaker outputs.
CONNECTION / OPERATION
Connect input sources such as CD players or cassette players to the
RCA inputs, connect a microphone to the balanced XLR Mic Input.If the
microphone is a condenser type, move the Phantom Power jumper to
connect the indicated pins.
WARNING: DO NOT GROUND THE SPEAKER OUTPUT
TERMINALS.THE SPEAKER TERMINALS ARE NOT AT
GROUND POTENTIAL.
SPECIFICATIONS
Line Input Impedance: 47K 9
Mic Input Impedance: 600 9
Phantom PowerVoltage: 12 V
PowerOutput: 5 Watts (8 Ohms)
Voltage Gain: 40 dB
Maximum SupplyVoltage: 18 VDC
THD: .05% typical
EIN: 3 mV
Efficiency: 65%
Input Sensitivity: 28 mV
Bandwidth: 20Hz - 25 kHz
Size: 4.25" x 2.375" x 1.5"
Weight: 1 lb.
SCHEMATIC
MIC
INPUT
LINE
INPUT LINE/
POWER
OUT
SPEAKER
OUTPUT 12 VAC/
VDC
PWR
LINE
LEVEL MIC
LEVEL
PHANTOM
POWER